{
  "manageEntity": {
    "action": "Update",
    "entityId": "449203874",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xb546e7f497d3917a6dd0c9242457e0ade0f8621f2a8b2471c9b09bc4bc5a6cae",
    "signature": "0x087c84906af174d107120e579208eb709d78f3920dec1570ccdcb826539c7f0e78bc2692c4b133da50457df0195c56ef80597761f8981ad78804aa4bceb200bc1b",
    "signer": "0xF146DAbBEa4a64091535c0e39A419D65150Fa66c",
    "userId": "449203874"
  }
}