{
  "manageEntity": {
    "action": "Save",
    "entityId": "1919925508",
    "entityType": "Track",
    "nonce": "0x82bcb1f594be3522a5d555e5ab2c2d92df2c9ede3f686f8334b66f77564d084d",
    "signature": "0x5b9d17379ceb2d9b6d84f8fec19aa299f4dd1d51bec1aefa9b6a91a58e961ec47af4edc8227b976dd193c393f41291ea033ac020dee2fb72bff382f183779cea1b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}