{
  "manageEntity": {
    "action": "Update",
    "entityId": "188840731",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierabh7sq6kgjwgm5mcnl5k5pbmrnmzuy3mkzzuzyeawzcjq65tgsgnq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":600801799}]}}}",
    "nonce": "0xb66d15fad4a5cd65d5d1c9177690ec9c7e489217ab83c086cf60d5ff47a72dd7",
    "signature": "0x1dfef9e20fbe968c22f41337260c64a470c8f983ed883d14a7a89e19c4b602733b9d23abd9fef69ddbc28c4b21541d326d92dad8462bd0094ed7c0f3fe5b3fe61c",
    "signer": "0x20cAE795D2700f9075efF654C51FDD875673Bbb6",
    "userId": "188840731"
  }
}