{
  "manageEntity": {
    "action": "Save",
    "entityId": "613655",
    "entityType": "Track",
    "nonce": "0xee267cd4374cd04f5be508c96eaadf82fbd696fab747a4d7acb962b2c77053c4",
    "signature": "0xf1c73543aea5d9912e1112b3f116695cd6f98783e69b7618a386e304af77038220759d880ab730fe97853f444d5805810a58d1fb71eddefbb39eaff7da0da8071b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}