{
  "manageEntity": {
    "action": "Update",
    "entityId": "300815705",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x14ed8318f70f7c42763bdd4122de6d24842f46795f9e2dc4efe82109b4cb4af5",
    "signature": "0xa4b6e710b6ed0102a69553ccc1b66ea06176720766ad166ee98fcb0ea85b43ce74f200f12f338a4071fe51d06e344bbf659ba75319d239606143abce476235431c",
    "signer": "0x17E5Cd991203390519d2FC47aDbaC0DF4B27bBe3",
    "userId": "300815705"
  }
}