{
  "manageEntity": {
    "action": "Save",
    "entityId": "893901983",
    "entityType": "Track",
    "nonce": "0x271d96537a1055b75f994735d6004c9b6218fdbfb343830a16d2b4c371f1808e",
    "signature": "0xe966703879dd881f345d010850e63bc3062cf0c33528cce134fbda852f46dabf224dd17f1c365138c8079e641129fe209280c40bd20d270e79c220c36f04ce951c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}