{
  "manageEntity": {
    "action": "Save",
    "entityId": "1556495270",
    "entityType": "Track",
    "nonce": "0xf1cc35bd861b9e6d0c162005010747f7b5dd273298ef33c62e903f5aaef4d785",
    "signature": "0xa5385eeedfb1470d52b7abbc605e77e1694a623754c0ea4b3656eb65e0449ffb4faa8f1231941c736a5baf37870a34be9e26df69cd131f35103c1cd579ad99d01c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}