{
  "manageEntity": {
    "action": "Save",
    "entityId": "1903464834",
    "entityType": "Track",
    "nonce": "0x93499778d599da702074321404b65e22cc9a57663e5b3b72aac65ae03b708c77",
    "signature": "0xed3f10397a0356f37662a64904ff5a6626460f0e5e88111d078e35c7bddfa128441d2e11839179ad3f4564fbe2e8c4a260f74178828eede21a298e15deddd3691c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}