{
  "manageEntity": {
    "action": "Save",
    "entityId": "1193484893",
    "entityType": "Track",
    "nonce": "0x92f72cec7ef678ce0b10900bb95bd56161d1914b409a10aeda1600d1dc7944e1",
    "signature": "0xce9f408e58d6238473ff4cc31dd8734d7b8b6957180acd6adcbbe932bb9372852b65ae8ee5071c6b994a6ac7f1ce997669138ac94f739f8d267fad03acebd3a71c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}