{
  "manageEntity": {
    "action": "Save",
    "entityId": "969029306",
    "entityType": "Track",
    "nonce": "0x99b8f8135477f5d2bab8d5b000e9fc2ad6022cecdd09e3df72bcc06a1ec7ff8f",
    "signature": "0x3f29441de2dd145167d7352af275e74b2c1bfd118565cd777571440ab9030c711f36a12ccf7b64b24c3d7bb7f1731c1195a2f52097b0476639aada3be43356471c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}