{
  "manageEntity": {
    "action": "Save",
    "entityId": "635702446",
    "entityType": "Track",
    "nonce": "0x8b57bee148ed9b52b8e339cbb782295a3695b7cdffaa76a78e7c6b0b88636a76",
    "signature": "0xc8db021f6f9fdc8640eabff31755b5e82b52135afeae3f6e469086d031d214e11beeb47921b94af6b4a4c74874654e383dae8c3e5fe2f9353273640d4c10c31f1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}