{
  "manageEntity": {
    "action": "Save",
    "entityId": "216065332",
    "entityType": "Track",
    "nonce": "0xd3a1f2b23c89b454f80c12826f98a8b7938d496114b739fd38ab65ab92f51835",
    "signature": "0x1ced790d6465fe7d161a238c5da446bd1bf5966ef57cbd2312de1dc311ec9ca913d93d13d8288379279922047ae442a403d65af5757425836d0009f120cf89c01b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}