{
  "manageEntity": {
    "action": "Save",
    "entityId": "627680175",
    "entityType": "Track",
    "nonce": "0x9c8dcc4e016345edcba4e4dfed191b6fc0a3afad1a1370088c529eed2d2c8b92",
    "signature": "0x566a399ab638a3dd0dd3fc36bb197805fd648e9371295eb00b2e0ae2b4e0cbaf191f99d564035c32dfbac9e28b478384ff4e97f89cb2878b030c0730c40b74271c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}