{
  "manageEntity": {
    "action": "Update",
    "entityId": "212012923",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3dce34f177850360b971ad06eff6c51d4840e4d62ad9841a58eaae3f0c210714",
    "signature": "0x13e25e9907f098dc3837aff83e0806eab5e4521b89f554f8989659f666d5799e4efb3165d54a579493f3a2b9ea280e1e2a6d99749d1993ba0f104c8e6b58798f1b",
    "signer": "0xDAA64Ac7b864f54096b2d3C5FAbaECC8563A4293",
    "userId": "212012923"
  }
}