{
  "manageEntity": {
    "action": "Update",
    "entityId": "449203874",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x73ceec45d4250ccc0c5822bc08230de5d780bf62dee83e9e554b04b4044043e1",
    "signature": "0x4f4960d88575751098a174d4c5f16698b9655940547a4bdc28131fd4f9639084456a85d459182e525ba724d65eb20f3bffef6faab45022c36d5dc3e97cc927181b",
    "signer": "0xF146DAbBEa4a64091535c0e39A419D65150Fa66c",
    "userId": "449203874"
  }
}