{
  "manageEntity": {
    "action": "Save",
    "entityId": "891333777",
    "entityType": "Track",
    "nonce": "0xb2b90c1a92b6568ba8f17d19366a759761e584f3ef0a1734218807de22dd7315",
    "signature": "0xfb17256b07460b9592d1b028d3991ab732d36d39ca6a10d4e968a3002e9c9d74545d2363112a8bb522ad79765449d1b60fd0a9e7f8ffa9eeeb5ebaad1299684e1c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}