{
"manageEntity": {
"action": "Save",
"entityId": "252578",
"entityType": "Track",
"nonce": "0xad90b91d778fabbe1ca6f4b495d93f710f0f63cc07dd194b1684a05c3bd61bac",
"signature": "0xde59218174118745c013cee757eed617a04dba76c0e86fdeb253bfbe831cd16728a8539734b3d02879d1e86240d604837d7bd7164df85404b491c9e298198a3d1b",
"signer": "0x3D4d8a781454E2338c482dE697d6DE1ACc7D9031",
"userId": "599751364"
}
}