{
  "manageEntity": {
    "action": "Save",
    "entityId": "1489991351",
    "entityType": "Track",
    "nonce": "0x9df12e70cb6c538385b8409641b585014aa6c9e0c5e2718621395c849623d53f",
    "signature": "0x71e502d17f39e8c03e2e5bfb0987d1203bedc8d374b716fe7db710d71305cd915b06ec8d3233837193023a3d223f5808a8966c098c5a6796ae463de93ca83e581b",
    "signer": "0x13f8ca0832087662A9bA298e1F708853B8615826",
    "userId": "990836999"
  }
}