{
  "manageEntity": {
    "action": "Save",
    "entityId": "1997825744",
    "entityType": "Track",
    "nonce": "0x4d8944430bdb859828ac552485d089ccea1543fe414a87008a70444e29fefaa8",
    "signature": "0x209eccb06f4149094080491f7d5fbc210fd9ceb877c23621fc22519795d4b62478c06211b091b2d85e2940ca0bb005f2931d5425f972d6f897e722f3bdc8faac1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}