{
  "manageEntity": {
    "action": "Save",
    "entityId": "1745104059",
    "entityType": "Track",
    "nonce": "0x4891d057e29fcd38687c5df82a5e6073907d8e704eda37f9845e06742729ab33",
    "signature": "0x6e65e37b57d2efba24b6bb0270c4db410322b77d830a1cafca831902dd11581309ebfa544d8807d35fa5aeeddf87f3488d89dbd096194f78f18619facf9ecafd1b",
    "signer": "0xE043895C8FfD2B49bac2344cB728935E7B4f61Ee",
    "userId": "777109830"
  }
}