{
  "manageEntity": {
    "action": "Save",
    "entityId": "178866174",
    "entityType": "Track",
    "nonce": "0xf615c2ad4a42b0b98e33842f36998865a8304e63ba639cfc428757fc7a28b344",
    "signature": "0x5c4fcffcad53705f2cb05996647c6556d0f7212c93a6d4ba1d4301cd67fe4c6055f9c55926c806de66cf74c1e6905e93be891185e391a4c26ab164cfd5e830901c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}