{
  "manageEntity": {
    "action": "Save",
    "entityId": "1238908130",
    "entityType": "Track",
    "nonce": "0x47ea599fe8258bb1227aa31888c44154f990227f82779ca3e1c91dd71c3dfcad",
    "signature": "0xaeac3cbfa8e6cf034ba82a0541d66d9153f8da50403810ac681eb700d2778e5969c8d75b5bd11bbdb0ef8a883a7bccb8de67e585d53b22f2f4202dd0cc620cbe1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}