Invoking bitcoin-cli help getblocktemplate shows the following as example result:
0{ (json object)
1 "version" : n, (numeric) The preferred block version
2 "rules" : [ (json array) specific block rules that are to be enforced
3 "str", (string) rulename
4 ...
5 ],
6 "vbavailable" : { (json object) set of pending, supported versionbit (BIP 9) softfork deployments
7 "rulename" : n, (numeric) identifies the bit number as indicating acceptance and readiness for the named softfork rule
8 ...
9 },
10 "vbrequired" : n, (numeric) bit mask of versionbits the server requires set in submissions
11 "previousblockhash" : "str", (string) The hash of current highest block
12 "" : [ (json array) contents of non-coinbase transactions that should be included in the next block
13 { (json object)
14 "data" : "hex", (string) transaction data encoded in hexadecimal (byte-for-byte)
15 "txid" : "hex", (string) transaction id encoded in little-endian hexadecimal
16 "hash" : "hex", (string) hash encoded in little-endian hexadecimal (including witness data)
17 "depends" : [ (json array) array of numbers
18 n, (numeric) transactions before this one (by 1-based index in 'transactions' list) that must be present in the final block if this one is
19 ...
20 ],
21 "fee" : n, (numeric) difference in value between transaction inputs and outputs (in satoshis); for coinbase transactions, this is a negative Number of the total collected block fees (ie, not including the block subsidy); if key is not present, fee is unknown and clients MUST NOT assume there isn't one
22 "sigops" : n, (numeric) total SigOps cost, as counted for purposes of block limits; if key is not present, sigop cost is unknown and clients MUST NOT assume it is zero
23 "weight" : n (numeric) total transaction weight, as counted for purposes of block limits
24 },
25 ...
26 ],
27 "coinbaseaux" : { (json object) data that should be included in the coinbase's scriptSig content
28 ...
29 },
30 "coinbasevalue" : n, (numeric) maximum allowable input to coinbase transaction, including the generation award and transaction fees (in satoshis)
31 "coinbasetxn" : { (json object) information for coinbase transaction
32 ...
33 },
34 "target" : "str", (string) The hash target
35 "mintime" : xxx, (numeric) The minimum timestamp appropriate for the next block time, expressed in UNIX epoch time
36 "mutable" : [ (json array) list of ways the block template may be changed
37 "str", (string) A way the block template may be changed, e.g. 'time', 'transactions', 'prevblock'
38 ...
39 ],
40 "noncerange" : "hex", (string) A range of valid nonces
41 "sigoplimit" : n, (numeric) limit of sigops in blocks
42 "sizelimit" : n, (numeric) limit of block size
43 "weightlimit" : n, (numeric) limit of block weight
44 "curtime" : xxx, (numeric) current timestamp in UNIX epoch time
45 "bits" : "str", (string) compressed target of next block
46 "height" : n (numeric) The height of the next block
47}
actual result has more fields (capabilities, transactions(probably the field without a name), default_witness_commitment, longpollid) one field is missing (coinbasetxn):
0{
1 "capabilities": [
2 "proposal"
3 ],
4 "version": 536870912,
5 "rules": [
6 "csv",
7 "!segwit"
8 ],
9 "vbavailable": {
10 },
11 "vbrequired": 0,
12 "previousblockhash": "000000005b00d9476d756947955556e6db801c676e6650118d633e66e800b940",
13 "transactions": [
14 {
15 "data": "02000000000106a84cea3a37cfe6a38c12fbf64761ac926c2f4ab05bbdac5b187e438f40860cc00000000017160014422b977c6a28f69359e2f0dfb6aa5197e466e5b8fdffffff33d588cec09c12f009fa9663a3db4390a4e8ddafe7d9a31092b3d$
16 "txid": "9493cb4f621a1f95a264526f216914f741e6f01bff3dfdab5ab9ec81c3ce16a5",
17 "hash": "543794756b046709b40c22ed9d0aa9492ef64e1f28d193a00efd6fd06e419f0a",
18 "depends": [
19 ],
20 "fee": 133272,
21 "sigops": 6,
22 "weight": 2467
23 },
24 ...
25 ],
26 "coinbaseaux": {
27 },
28 "coinbasevalue": 19864212,
29 "longpollid": "000000005b00d9476d756947955556e6db801c676e6650118d633e66e800b940529",
30 "target": "000000000000000e7e1000000000000000000000000000000000000000000000",
31 "mintime": 1596097882,
32 "mutable": [
33 "time",
34 "transactions",
35 "prevblock"
36 ],
37 "noncerange": "00000000ffffffff",
38 "sigoplimit": 80000,
39 "sizelimit": 4000000,
40 "weightlimit": 4000000,
41 "curtime": 1596104418,
42 "bits": "190e7e10",
43 "height": 1781942,
44 "default_witness_commitment": "6a24aa21a9ed167e62a901109d5cbbc8d3892c8e12f66c2b52a8675df9bbb0b30fa2c033ae30"
45}
