{
  "manageEntity": {
    "action": "Save",
    "entityId": "1045893213",
    "entityType": "Track",
    "nonce": "0x6e3b993c4bb591af7f778f523a1f800421c35bf193b41da21ddd618388657fbd",
    "signature": "0x5b797398b2dac470530dd0b77578ed871131ef7793886d1f234eac2e8e69d5a75a97034ba9eab35b9f374eb00674e7911f598f0a63547e240ea9a4fea161973c1c",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}