{
  "manageEntity": {
    "action": "Save",
    "entityId": "1928463676",
    "entityType": "Track",
    "nonce": "0x98ac01805425005c27ebc4009df0262b7f66ad058ec7435d38f517a7f40af92a",
    "signature": "0x03bfb91b480431e5fab0e6fda6c2add0bf4647052285fb3ccc8c9f449d6049855bd1d1fb0c0ec58cc440891162a814056f91f5cd278d6e0b6ca16132bba5bda01c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}