{
  "manageEntity": {
    "action": "Save",
    "entityId": "985424047",
    "entityType": "Track",
    "nonce": "0x0d148af5bf366646f06c08219363e9abe6ebcf8a7b00defade38d91981450a4e",
    "signature": "0xf3a742a6cab8b7333a135354d33e2c67462ab395140ad94e2c9f0a5e657e60eb2ddc50663d93d622f57f6828e99dedcb877e4e4f52a264bbf89b7632720561811c",
    "signer": "0xDd2c9d2D9FE2896f0cDDDe8FA8894c2c51d2a589",
    "userId": "203576373"
  }
}