{
  "manageEntity": {
    "action": "Save",
    "entityId": "1441790358",
    "entityType": "Track",
    "nonce": "0x8676aa2e16d246c874840709b754c38d34922bcf50298eaad3cce5d364793109",
    "signature": "0xdcaa554ee596656c16c3d2e0462841e352501b41b93a1fdadb42933630d2f5e540653631ab83c773c74105f99e3e48ae6eebabb509792f42024cf6b18ad208b01c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}