{
  "manageEntity": {
    "action": "Save",
    "entityId": "1480700685",
    "entityType": "Track",
    "nonce": "0x3dc63869efe0d70a9d625cf10bfd0909bd475abe816fc8d6d6523d21508a311d",
    "signature": "0xea613e8e50a746f079475a0a354bb3f2711e0e82df8bcc0bd4cf8c616845d4105d256818deec4400481d60e463384b6833ee13b2193d786c7c0b26fae96639031c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}