{
  "manageEntity": {
    "action": "Save",
    "entityId": "994694",
    "entityType": "Track",
    "nonce": "0x87e8477e22829fcd50365554c613ce5ace324c33b0314404461462e454f1e7a4",
    "signature": "0xa9b41c8760327c50c8aaea6b0ea3eb05fee1e31ccc4b5e9da77623df767c9f043e8b0900387c7c4cf0e2895c11220b7f1d6c541dedca8cbab41ed5f39c1d318a1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}