{
  "manageEntity": {
    "action": "Save",
    "entityId": "1499408317",
    "entityType": "Track",
    "nonce": "0x5893c3e6150b0ff14c17e1120a110c563c5477ba4dddd9812af40f422016ba02",
    "signature": "0xfbd155b4c2de30ee698f3bfdd1778b0e39625ae4f7212bab9ec41040a198a7283c33568e90bdb9231da4ddbb3b389b235af51a417ade84a0121ad45ddaef11631c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}