{
  "manageEntity": {
    "action": "Save",
    "entityId": "1870725929",
    "entityType": "Track",
    "nonce": "0x6888de1f4863cf09f45df466d5700d0ce6ef8d8387733ad04fad8655d7aaafde",
    "signature": "0x58d0db2ef4ab3ceebeebeeff5964ab9c6dbd552e14629fa48a28659ab83c253e781cbb2525b7d759364492cd0e66f4e6544a9c00fa43c92f139bc0c7adbf10fe1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}