{
  "manageEntity": {
    "action": "Save",
    "entityId": "633860",
    "entityType": "Track",
    "nonce": "0xf9765520654d6543d8c5752cbdf84f8635033137ffc6d54781f282f17af0fdee",
    "signature": "0x195332709a7128592aa6258a979a90bfc17ca04e4b8c300ce607f69b5d56521e212482950fc6a9ef04cee25cc17813fa255af8c6269e8932b9a59c86d3d36d811b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}