{
  "manageEntity": {
    "action": "Save",
    "entityId": "582037777",
    "entityType": "Track",
    "nonce": "0xc615c17cd0b3f9a2afdb03a636a45afbada034ea96f815ded5bb9c85ee04c670",
    "signature": "0xcc5507d5852b0f0781bab497593ddef1dd1cc94b3f14eaf0aa9e3ad4e92d4cd035a15c8850fc666aab77d3fa428848722f65ba5ae308c9c709edece6e98c8f131b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}