{
  "manageEntity": {
    "action": "Save",
    "entityId": "1833045859",
    "entityType": "Track",
    "nonce": "0x893d820e0806462a1eb52c859bad288a3deeac946ef4a4a0ec8279315f927cd4",
    "signature": "0x7cccfce2a4ea6e0d24360e621c985a6336cce9ceec6a925a17e5804c68f5387e434c3d86eac62ca0fa24fe860e120ad6bac029bfdeb33c78fbc3c1bc28aa040c1b",
    "signer": "0xB57F94Ef9a26d73E8b35D3f37FccD18BcC7eeE00",
    "userId": "850416615"
  }
}