{
  "manageEntity": {
    "action": "Save",
    "entityId": "1910810418",
    "entityType": "Track",
    "nonce": "0x445b504327d3c4afda65503a581af5448c8205105b10295eb593d47295fe2f2c",
    "signature": "0x48b8350dfb4873956ef019369f4a7eb13b4e4f2ffff379e47e197b179d12d6302fb4351650d0b1ecf28c1a4d7ba627c4a86b0e4637178d0f38e7040c701fdcb01b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}