{
  "manageEntity": {
    "action": "Save",
    "entityId": "230364771",
    "entityType": "Track",
    "nonce": "0x9a46659077533fe9bbca5a90137e109eaf6e63cbeceae4e5ac8a8971ee69eb6f",
    "signature": "0x68561a9fa89115cef852772aa759f32c11ba292c6f41486d2364c07819c8033a2161695b5719c8c0aab6792c52298fcb304aa3a7e0284d1d9ede71ab3b04ce3d1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}