{
  "manageEntity": {
    "action": "Save",
    "entityId": "365230",
    "entityType": "Track",
    "nonce": "0x42c39030e6a2ee9fc3aab84680712f8dd1969b07a79107810d0bc2810a978569",
    "signature": "0x8a8620916a388d75dacaa5f79cde20eb125968c513d10b88c263e3c2b13f7ef249cc5a6c79f350b4b6a4b07ec085013776bcad3d0a8f5793956276dce752ffe41c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}