{
  "manageEntity": {
    "action": "Update",
    "entityId": "912435990",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3310254f2d4a9c2b7c7f1904d4e006b2e287ab72bea7fc0b152d5a424a1dc0d5",
    "signature": "0x152edb9cbeb347d4a33ed8ceca42701463c85b5d39ad1ffdcb5d321d08d3aca917f261824273440cd8be0a2df4062e32b0bb05359a47deb92a5927d32ddda0401b",
    "signer": "0x76f762a21bF9d5e3dfcA256F2FA36ACb298C6a15",
    "userId": "912435990"
  }
}