{
  "manageEntity": {
    "action": "Save",
    "entityId": "280350603",
    "entityType": "Track",
    "nonce": "0x4883f1878d634a5b553783762b80d3e240870e5da458a3f919ecde80ed1146ca",
    "signature": "0x1189b42728f0cc206a30ac21889a7dbf07de7280fa6f72914d8f21872758a3653360e77684c0a7f8f848f4de094997a1b4dec699cfb6425be06d8f9884b3a7031b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}