{
  "manageEntity": {
    "action": "Save",
    "entityId": "1617048350",
    "entityType": "Track",
    "nonce": "0x631606fb38776a3a87b82d281def701e7d79d8df8154ae0d5c2bd85a426824bc",
    "signature": "0x06aa111ced5730f2b7bca331f6a15f04cb7be0646e3f0c7ef20020788ed41c170551f5731d61a37a23764f7b805932699c9508838085cc8dc0c11dab072eeab01b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}