{
  "manageEntity": {
    "action": "Save",
    "entityId": "1809810958",
    "entityType": "Track",
    "nonce": "0x482c92a2bf6818a8d963e4cbc7bafba85ff1f0ac4f514304c49f923b287f19aa",
    "signature": "0xa2475ebd838de85758195716f791f739dddd73c177d78f0b0e0e90c9b223e5c465dc5bcbe38f2ba00cc15e43b205b41122245321e14a6634b4fa9745eed28ed61b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}