{
  "manageEntity": {
    "action": "Save",
    "entityId": "1533163401",
    "entityType": "Track",
    "nonce": "0xf1a5ac3195ad805c24570cebaddc5bf1f85c89944d655d5ae0df1b00f0e522e8",
    "signature": "0xdb019414ed2ce2f1d59949a997a9fd111eb7143e91c6d24befc8b4b4c5d3153f0d42deca70e579ae3771df5f182ccca7ae6caedd8c6278a2daeee623fd6dc0b21c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}