{
  "manageEntity": {
    "action": "Save",
    "entityId": "297710046",
    "entityType": "Track",
    "nonce": "0x44351a9e4eb8480672a5a6f788b3ad3e3f8a06a972ba3276e49aa8f586b29515",
    "signature": "0x4a23d002cbef913a60f0281de213e5ab03f25c3b001456577b7e0ef1579127706ae1e91918ecfb689a18345414adbe35e134d705f207f3bcf0fa52439fd6388b1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}