{
  "manageEntity": {
    "action": "Save",
    "entityId": "307247",
    "entityType": "Track",
    "nonce": "0xbffbadbe825b1c112d61bd2d0f1f74bec9f974804caf23eef3780a3d83fb37a1",
    "signature": "0x9823af682fff23142276a9e5757cb2b4b21f817e2f89bcc03d463b25d57de1ac70a71eb36f117de0e56652eb56ca37186922f23ccc5065f260ef719d88c0e9151c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}