{
  "manageEntity": {
    "action": "Save",
    "entityId": "301625982",
    "entityType": "Track",
    "nonce": "0x0584556790c877245d15e0c27b31c5d1c01ccb9765f6cede9ecd55dbd695710c",
    "signature": "0xb3aecfb5e645ed9667d2c46339fa43c33917093636b893180e2c804875cb68f4405156d43c3cfee39979da3137966bbc9804b1d024b6749370560dc01356d5cd1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}