{
  "manageEntity": {
    "action": "Save",
    "entityId": "223337",
    "entityType": "Track",
    "nonce": "0xcb077711b0fe831181f28b297ac2dd6ad73f50de12f246053189c21665f9b799",
    "signature": "0xf5cd216fcbd70ec016f7c2ad8a9abbff91d29fd1ede45f884876eb04acd7f60c054ff3cffe721fa9502821a3852c55347b28f77d350d951abe9d9f4ca919e9851c",
    "signer": "0x48997477d821e30d3Fa835d1Ee7809B3253Cb100",
    "userId": "75085"
  }
}