{
  "manageEntity": {
    "action": "Save",
    "entityId": "809858781",
    "entityType": "Track",
    "nonce": "0xa79900a7d492c2c1fbc2301dc4240d3dd9f4cba5e64c6328d5391cf5a9bb731a",
    "signature": "0x35c67c87474d6216f9977f4cdb35e37dec2b7cf00c57e10769adce1bfe3df07f761dd4fb24c223700b41dfba626b3d0aeff18bf52eac379279d26723b4c7e01c1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}