{
  "manageEntity": {
    "action": "Save",
    "entityId": "354495084",
    "entityType": "Track",
    "nonce": "0x3348efa1538bb3e1d867feafb6e0fa8f0d4dc1305cee46e9f4641a5242d7d91f",
    "signature": "0x5f4e40e9cc84f861ed4a48939dde8a931eaee9cbb7601533dea6f390ed1a339a0d3cf53cb3994d038f305c07f36187fcedbf6bee78756d39059b34f952c948aa1c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}