{
  "manageEntity": {
    "action": "Save",
    "entityId": "320684170",
    "entityType": "Track",
    "nonce": "0x0cc228f8c2bf2af5c9db3c7ec4d4e56f2186cb59d62c6b37d6ade8f64d57c547",
    "signature": "0xd5539125a2d16f2cd3bcd07937bb184fe89718b3516e1757227847f3726e157f27ffe73773acd8fe9cc0b0f827543d7f2472a44fa62a95a89a342b2221b291571c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}