{
  "manageEntity": {
    "action": "Update",
    "entityId": "449203874",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x4d90149fd61d01aabb973d513bea60c19c2a82fa555d917c08038f8b55dbec41",
    "signature": "0xd29478e50ef10ee91ed4b10810181d5060a056811e7a549441277d773d55fce433a4602e84e78498351243d71ee91f96ff426edb9bc26f5b6950b0ff90f01a081b",
    "signer": "0xF146DAbBEa4a64091535c0e39A419D65150Fa66c",
    "userId": "449203874"
  }
}