{
  "manageEntity": {
    "action": "Save",
    "entityId": "1446881828",
    "entityType": "Track",
    "nonce": "0xa3d8753c4000a19943c71393395d17f3a89dff350350be7aad81c7dca360996d",
    "signature": "0xbd84ef0edf50625649a4e92877925b396aa3e9be1695384c2406a3b9504d29cd54327528b4e265af5b48285a20e840dd7b5b4cb6121c688cae5d3b019354a1bd1c",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}