{
  "manageEntity": {
    "action": "Save",
    "entityId": "952939748",
    "entityType": "Track",
    "nonce": "0xe2f0a564ed090c0350be9b1b317c29e761af0b45db7cb2fc7ee784a5ae061b4a",
    "signature": "0x870b20ecfc69ad50b68d1fa52a58c71e1b115632a1013e441cf4aa39bd283f381e967180003f97cb807baeaaa816abbb325e163adb7e1e5c744dc5e322cf92441c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}