{
  "manageEntity": {
    "action": "Save",
    "entityId": "208850679",
    "entityType": "Track",
    "nonce": "0x862589f722291180c5402256c0cd3297c1a53548f19d8b847722b9af69b28074",
    "signature": "0x36ccd94a84cd252b33ac1ad499fd06d9c33bfaf25d216fcaca696b192fc165183ad1a253992dbc1e4812987924d30bc7d29e737e1b175ef50e78c5fcfccaeab71b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}