{
  "manageEntity": {
    "action": "Save",
    "entityId": "353229050",
    "entityType": "Track",
    "nonce": "0xaf642ef542478282951e34987a1efc550bb9a8736a41d4373ff902e3707d3337",
    "signature": "0xc5f03b6567175a6a0bbcbbf7744286fdf703e87afbe6fb0945ea4de3de09d8c33a1a6ca499671834e68eb4c850e0cab005b833a2e3df6055503b6512c623cf131b",
    "signer": "0x204B971E7FCEAe8EEb58417458bA71C79eAd8948",
    "userId": "652"
  }
}