{
  "manageEntity": {
    "action": "Save",
    "entityId": "2072174550",
    "entityType": "Track",
    "nonce": "0x04b9820ed8dbb865af0545da2283b4638d302847b9aba7659217a3ecdf32565c",
    "signature": "0x99ff14847d4280d49f806321e4ffdaa94ea1695397692b29d276553423c7cd062b19a5bcca4073ff41dd199fec24c73a6e6f8acfb3755175fe4cb8e8da6495161b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}