{
  "manageEntity": {
    "action": "Save",
    "entityId": "265635605",
    "entityType": "Track",
    "nonce": "0x0e94f8a26f4cb5837de91f4fa7a24f9869dc3738334167bcae693c9425c21d9f",
    "signature": "0x5abf8c95d9df02ff9dbdcd551af978536baab122b75ea2a926789cf49edc08fb5baf476b9194f210b88dffc7658d8d93b8347b991b95608bab882a432f6cb3241b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}