{
  "manageEntity": {
    "action": "Save",
    "entityId": "1345168412",
    "entityType": "Track",
    "nonce": "0x04b6a93900b970048d7e10468b24c6afd7ea75ead4b2ad90c312edb01e019cc5",
    "signature": "0xf326074599617beb7544cd2eadf818cc09b26bfdd9c80bc0e34f351ecdab382e45d23662b1950d18b8f2cff21388b7fc67238c12b53cc33d38ef1f63157a695e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}