{
  "manageEntity": {
    "action": "Save",
    "entityId": "372914686",
    "entityType": "Track",
    "nonce": "0x01d1a32d849032aae897731e61ec223758a2c7a0c514afd71299946eaf93638b",
    "signature": "0x6c5e9c6b1fb90a653f29929d980dfcbe9f73118e98ed360f97e485827a4281a4522fb0488f2c6d5b78ad7c0b2ed31ee63f60b91831c4a6336516b511a8bab6b01b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}