{
  "manageEntity": {
    "action": "Update",
    "entityId": "423753950",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x9de2c51d8c8e1f33716614cb8e62320b82ba46770b766398874020a173c930bd",
    "signature": "0x2d40df5be6537f3ad9c9e53b3daef74d64ee81690adce32e9881353e1773c0ba3ee118c87c605ed4a9375e0bb46e82b94c003cd982d33ea4072fd4e600fd73ea1c",
    "signer": "0x905737799FC3f6BF9Be7db39A108fD35B9203B31",
    "userId": "423753950"
  }
}