{
  "manageEntity": {
    "action": "Save",
    "entityId": "1259062254",
    "entityType": "Track",
    "nonce": "0x9272e2084167a7fbadbbd7f146917deeda8d07343bddf0df5c16881a9de79af4",
    "signature": "0x897628b2cec842a983347f7139791a8ca55c78d4cab38a881fa3c194528a21e055cfa27201bce7891c332d78268676778ea86f44bdf6807fc6146394a760a9411b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}