{
  "manageEntity": {
    "action": "Save",
    "entityId": "854780",
    "entityType": "Track",
    "nonce": "0xab4ea0d5d4ba539c830fce0b2a5ba79c510dec09738ebeed7cb5055b8ab252f5",
    "signature": "0x928251b15cc46f9075fc6a63f040efc6f705e36c8fabb14666080f4615841b692b55585ab3e5ec3a8e4800bd046eae3e15d8a49c1d70a3fa0bfc6e83b13a8c771b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}