{
  "manageEntity": {
    "action": "Save",
    "entityId": "1139073179",
    "entityType": "Track",
    "nonce": "0x16559dde916f3079f14c5d9bfdcc0514c4a62b1b4908599baae35d4f81362e69",
    "signature": "0xa35a2411ac92e1997a7ffd75ade78706ffac1e45a7afa0b24ced6d6c15d3e3196fea6a3dccd73dc0701ba7cc4a3baff8e3ea2cb91bb1669925e30d0a097142751c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}