{
  "manageEntity": {
    "action": "Save",
    "entityId": "1479804558",
    "entityType": "Track",
    "nonce": "0xa820a8688c4137796c8cc52a5d0d8f02d4408a40fa9d40479d6049d0ac998d3c",
    "signature": "0x195a8e3f4f60e61c11ec7ac975af0b552a72fb4c1577f02fed76d472808a33680cd2d88d4e9070dc77829592cb4ec8ca6672c37f97b3009251b4b850a27aeb341b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}