{
  "manageEntity": {
    "action": "Save",
    "entityId": "327848567",
    "entityType": "Track",
    "nonce": "0x5c73203e112dc91f25147cf3c168bd5a1a1a45c4b3a81f16f06bd05c7c621000",
    "signature": "0xe2813b1da2ed429c72dd2b8b7e52bee5a538315446a08a8c1bf553a0e8397fff5dd331bb77d03da90fd1eac9aee9c0be7341b15e30bb60dbe7324b82263bf15d1c",
    "signer": "0x248512B4C662c3d750C21fcAfE74C242fB51fD00",
    "userId": "462464309"
  }
}