{
  "manageEntity": {
    "action": "Save",
    "entityId": "1834804570",
    "entityType": "Track",
    "nonce": "0x792fffd0d1d7fae7a57dddac510f10f3cc7be0bd8842937779ed5295ff1284e5",
    "signature": "0x740590802dc3dc26ec050eec7f1032a5bd68d54d5e9e1c54aacda58f4763d7f7776fa17edd22fcc9ec773622ca762be2e8aca2953276a55b4417dc39ee1999341c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}