{
  "manageEntity": {
    "action": "Save",
    "entityId": "190516",
    "entityType": "Track",
    "nonce": "0x8af296c6a5d0650afd2597e02fd75b1ceabb98cddef6a834a7071e36112e9719",
    "signature": "0x044b446124a8486e6c8edf8d10f3b42e00014e7f31a109562d7b7fd3a8a8768b51a3ef7c41ab21d7a2d6d0ad8bc163d7b988afdd27477b678b012d2a61365cfd1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}