{
  "manageEntity": {
    "action": "Save",
    "entityId": "1781594055",
    "entityType": "Track",
    "nonce": "0x027e67f1095a48f515834a98dc2d5832fae47e758023f2088ee1d8ce883c0568",
    "signature": "0x78418fc9eafd2c928298c29de2d1ef23da531656217e0eea03f0b85518319a0b70b024876f0c0e9ffc3efd0c8abe59153914ae6c406f0172c45afe51d6f5f8cd1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}