{
  "manageEntity": {
    "action": "Save",
    "entityId": "1578044356",
    "entityType": "Track",
    "nonce": "0x963166879a86621c5c9ec33101ea415d07056d20662a17eda1b8714e23c1fbd9",
    "signature": "0x4c2bce44175059b02c44ef694ce9773c1a65bae9dd757cdaf632c73a3abe3fdf6f31247519e252826ad2d86c224c8bdfdac1b6efd3b8f36f3e46ec037c07310b1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}