{
  "manageEntity": {
    "action": "Save",
    "entityId": "482810085",
    "entityType": "Track",
    "nonce": "0x54adbe3c01500f25f75ede0da4b1985e9c39324d0107bc3f8443ee5a9d2db2a4",
    "signature": "0x2db9eca513091d99ba27784af2ca0b3516facd8edc4bfb5a0caf82bcec6585f74b026e370eec4ac7b00596bdb96d0d4cb5e5dd5a8a56047e1f68fa429a003db11c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}