{
  "manageEntity": {
    "action": "Save",
    "entityId": "247420143",
    "entityType": "Track",
    "nonce": "0xd7119e178db28de4388ae61aa99516f6d74eafe95d48e90be762d3d13d591159",
    "signature": "0x59166343ff79ef0eb76b390f7cb372fd86629a0a5b76a7c6c8c9beeab7b9ea1629e2d88dae4c32b97d78b153aed338d800f997f135c8313e486a16b6e3cb7c2e1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}