{
  "manageEntity": {
    "action": "Save",
    "entityId": "1626473035",
    "entityType": "Track",
    "nonce": "0x5d426b3ebcdf661f0e072c92dfe8b4992bf759a55fd65376e555af6783c03db9",
    "signature": "0xdc41d33869b393055c9b55fb93431d861787acb691bab953e51550fa2f002e1f0bf7ffb8c1cb065539ed3776280a1fd64bd6860182e0d72aa7b1966c5d90ae9c1c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}