{
  "manageEntity": {
    "action": "Update",
    "entityId": "781474307",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xc6484ffb6700376c96e548d070d135d0800688fac414e2f302e9c36b6ca11ea6",
    "signature": "0x6b1855d4bc41b40349049ab0285c8c552727c0d475b520f893fa26c96ec882a73a5426c405869edd85262af551593e1c57d6e20288b50a08125613e2d483bd9b1b",
    "signer": "0x030F578721CEB2d0f9540AA435198EDFF9B77D69",
    "userId": "781474307"
  }
}