{
  "manageEntity": {
    "action": "Save",
    "entityId": "1124413875",
    "entityType": "Track",
    "nonce": "0x7c46a01a46503ac00441859c1701bcdb4567f1a6f655a923aaa6f41e0be2da9e",
    "signature": "0x50b8c2c70b0222f5b99be3ef88f39aa6ab58f67b68c0e7776bb3402bb8f3feca72b344e6441ea77cfd08b4a983fa4dae646b8d865ccd0bca0a619a309e50f7521b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}