{
  "manageEntity": {
    "action": "Save",
    "entityId": "54738954",
    "entityType": "Track",
    "nonce": "0xa5dcda344282662cd74ab46ea1358a5c8bbcf4d73d85ee67db87120f5d19d0cb",
    "signature": "0x87fd237b499b60b295f0bde68efac3521dfcc465562e09c3939a09f160ef7d31073e4e6145df1386a967bf72a42649157daa94349efeeb88f126e6c796c2ffb91c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}