{
  "manageEntity": {
    "action": "Save",
    "entityId": "847044149",
    "entityType": "Track",
    "nonce": "0xdc7763be6afef37e7380e2247d1658b5379b8f447b64169916eb5245d7f7997a",
    "signature": "0x5c0a322327c4d558afeb8ed3d13b84c4b603b22c994495dbf38e3120a10b6f5f5fcd320ba9d7a0845bd0468c8438b12dd689ce29577963f85567e8f90351a12e1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}