{
  "manageEntity": {
    "action": "Save",
    "entityId": "55332",
    "entityType": "Track",
    "nonce": "0x1d9c6b9a3810a03b88c974def2a7b4f655d99b93369b4a294d3548fad077eec8",
    "signature": "0x42ea6d364117f9658dd9626dee40510a7c1400e7ef3a52df55f17b6902d5fe7b6bb32de10dd4dbe8cb79a2d869460738599b8f934e13698ccafec937154116d21c",
    "signer": "0xF1b4395627a8eeecfa4bD1ce4C32e2F73822f857",
    "userId": "29063"
  }
}