{
  "manageEntity": {
    "action": "Save",
    "entityId": "224514478",
    "entityType": "Track",
    "nonce": "0x5585b975a6327800b7838c8cabe0c7816d8fd17984b4dd12ebd6487ae10bd604",
    "signature": "0x52a6acd5384f1b87edfeb7d373eddf2e9177ca39aa9c6be97b2bbb278ffe561d4638e8fee5904f88730fa38bc0cc48e818bb71b9389b7580d218e0662db36d761c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}