{
  "manageEntity": {
    "action": "Save",
    "entityId": "405727261",
    "entityType": "Track",
    "nonce": "0x86cac30f2981bbc7dff68ba267a2183ac2060ff75db0cd4ce469c718bb0b4b24",
    "signature": "0xa43d02dab1cbf5541fba2ea20b0efbfeef79b403345cd50383fea7f8d91f59c5669e0f96949a81e395ee42fd722fded0ce5f94f1f4d89d3d4556821cab6b06621c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}