{
  "manageEntity": {
    "action": "Save",
    "entityId": "325226",
    "entityType": "Track",
    "nonce": "0x293859b42aabaebc14429349503f64dc0f46e9ffaeed580d49998eea284f156c",
    "signature": "0xda81d46aee89b01cc22a43b1f9625f9263568887eee10112bf3a8e0cb99479be5c97502cf50ada5e372f3e326ec1a8175225c1d57ed94dd851f21528f4af66bb1c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}