{
  "manageEntity": {
    "action": "Save",
    "entityId": "1991640669",
    "entityType": "Track",
    "nonce": "0xbd8e4296109c73961dbc5e2d3234ffaaa55c8227bd6fabb1df80d40e38194457",
    "signature": "0x0b5a4adde981581ec2fd5a2ca679af88346391ebb97497453dd04c21caa96c35419ee75ae9c01aa8e673e714cb2189649d696269c009b2c1cad9cb8da42f06281c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}