{
  "manageEntity": {
    "action": "Save",
    "entityId": "515022447",
    "entityType": "Track",
    "nonce": "0x39aeddef26d2a081fdb43b4152714ebd6365b244baff543db2f73130bcba36b8",
    "signature": "0xf0189f1cf1ac28406ec607e5217389efead4520035c862a31bf5638123d807b06d8605d48fb4bd546477fd75bd4bf697a30bad3ecd8a1b15f187de02220d43661b",
    "signer": "0x061A60900C738C67bcf3F9Cb7Fe8f703DbEc8Ee0",
    "userId": "718327235"
  }
}