{
  "manageEntity": {
    "action": "Save",
    "entityId": "474188",
    "entityType": "Track",
    "nonce": "0x034f2acc58bcf74ff06780c3627c53ef80be2ea56b8382aa7d00b2d15e41a25d",
    "signature": "0x05f4aa0eebeacae3699a37da31c13d58652e0770c1ae317098f434621ca5551021843b549f1b05a20bb4086fc491a50681bb5dcae64b8452cf3793ebef375af81b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}