{
  "manageEntity": {
    "action": "Save",
    "entityId": "1748628228",
    "entityType": "Track",
    "nonce": "0xeb23eafc792982e2c7d218bb60754d08c5770d4f41e205e1a49152d75bc64994",
    "signature": "0x641f499b9329e829e5d71b425fabb60c75ae399695ea19ada3dc3bd5466c464c20549b536ae8c42d39f462662270a8a5b94f720a6eba3591327f9056bed468ec1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}