{
  "manageEntity": {
    "action": "Save",
    "entityId": "991592107",
    "entityType": "Track",
    "nonce": "0x05957b2715e033aa2c7b3e1cf56501ff872161de4825223f6026c57ac9387ba4",
    "signature": "0x5ce88daeab70290fd34cd4e61b877c99361862350d2734ab535e125a053399967ea7f9621db76735cb73a7aefebd82242b9abc82f53b849f3a21fdd21762e6a81b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}