{
  "manageEntity": {
    "action": "Save",
    "entityId": "51677802",
    "entityType": "Track",
    "nonce": "0xb4fa29c2cb50ac34ce2cbc86241086968fed97db6bbc9f338aadc94246dc1baa",
    "signature": "0x4201e681b75dc54ddba53c36bf3010fada1233946318fc8fd9cac7a93f466af24d78b1746e91db6103444b418410ee7f466a3bcaa5b01f58cf6334c8f6a9744e1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}