{
  "manageEntity": {
    "action": "Save",
    "entityId": "770060",
    "entityType": "Track",
    "nonce": "0x18da63824e66dab6e9e719f582773e7058ee41c368d4218446f7ab902fa482c2",
    "signature": "0xe0df7338ffa99acb5c3a3c376dea1bcea5c354ead649050ef5d5d600eaf11cfb349eece89510163d9bfda800f1ff4c33de9f70775c49e2d313a58fbf8a6eb8201c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}