{
  "manageEntity": {
    "action": "Save",
    "entityId": "650179",
    "entityType": "Track",
    "nonce": "0xf8d7ac4fe955cf53dfb8818374f93768d70b132a898dce287c21a9201f6b3c9c",
    "signature": "0xb16ba5d4785364b0309cb7800dba370027dbc7ee304c403e473bd5cd2c6d46fd778bb432690a2693888c28bdc1a669ca17ff3bb9db55015eebe6d41453ac006f1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}