{
  "manageEntity": {
    "action": "Save",
    "entityId": "402194730",
    "entityType": "Track",
    "nonce": "0x86658b921cb04c2ec57fe7e42f13c396cb5dbce2f6af46a267b0725e3f9c3def",
    "signature": "0x6956872e861e7aec2bb80595717de20191d28b2651940d595c1ffef5c0f773d44febeb19ccf13965df0d334aeb1d62bb52a75920c12d950ad699c4c0fd0f1bdd1c",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}