{
  "manageEntity": {
    "action": "Save",
    "entityId": "816017491",
    "entityType": "Track",
    "nonce": "0xc5d4d30fee5561504391109ae1818100b102ffeda587ca7c099c664363da1ba5",
    "signature": "0x19b4d519bce94e84df70cc1564f96311b50d6f31600de2560ffae015dabcd69a5c00908026abfa49d9492dea0111a1367ce9b4d7cc26895aba11526f9cb137f71b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}