{
  "manageEntity": {
    "action": "Save",
    "entityId": "1302721966",
    "entityType": "Track",
    "nonce": "0xa09ee38d4ee4703b46bfeb9b5c36053efb91760b6c5fa6cee5d3a3b647f990d7",
    "signature": "0x06ec026f04d1fbe217e11741d8d233e592b5746df18599f3e17e98a1ad639dc660be11b40e7e28157335e449e80e9c8e5f5fde959db655628d57caaa147eba9e1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}