{
  "manageEntity": {
    "action": "Save",
    "entityId": "699704125",
    "entityType": "Track",
    "nonce": "0xe49f4705f5d23d9117614cc354ba3aa76360867c344f28b7f90dc5fdd711c3a3",
    "signature": "0x2b0613c434c9ee082b5c30489d8c88b329744d109cd70e47c2c40467964fa75c7ad2326f2038dc7b6bb7cdc31dfe7aa3fc70fa3dde2eb136288a90717f0344481b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}