{
  "manageEntity": {
    "action": "Save",
    "entityId": "1600023224",
    "entityType": "Track",
    "nonce": "0xb694be9b3aea290acc89c8f98b0d27c3834634493e4ea601f4f15adad7df252c",
    "signature": "0x53d2b372a944b7b3415dad3032b267061c118a1ef68f671b564b44ab069769fe0d5173b14f0668163f5456de01af2444233ce272a65af0c9cd8104d84c73a8591b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}