{
  "manageEntity": {
    "action": "Update",
    "entityId": "456087321",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierajopzcud4mctalbfvhelhsl2wxxwj5xzu7kcabjolx2bqcmjqjbuq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1053100257}]}}}",
    "nonce": "0xdef73003f1bcae143227809ce5399ef3addf6a635f571095c7bc5f2724f05d71",
    "signature": "0xe8c30c39bb1b27e63abe50ad50456687468d3bc6d0d3e172658126390d56634349ec4501b09897d8e62a75671fca3008d6ba41fac1c6569150a4b0af0aa53ece1c",
    "signer": "0x14Cf60a0eab3a24fb7230Cc44B9a9b955d28E2D3",
    "userId": "456087321"
  }
}