{
  "manageEntity": {
    "action": "Save",
    "entityId": "1300375109",
    "entityType": "Track",
    "nonce": "1792364645891906833",
    "signature": "0xb0f0202fc99414db50dfb201a6fe47cad9551438a5cc957dd77c7158b6594640193914f2eda11ac2842cb8c4129b36f2156a0cf0e666931d4e15906872ab25dd1c",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}