{
  "manageEntity": {
    "action": "Update",
    "entityId": "557110086",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x4c3684297cec00b38220143ef6ea357e5011ce1982101eb57da97e11c1f9ea00",
    "signature": "0x0ad86b0b57d14461470e2cfa169376b2d01d8895c491e62c8ab15383ee3bb07f102ef762676cbdd140c1302efb98433e9dc3f2a480e65de7091ae77dca0cae9e1b",
    "signer": "0x2C8378e2B6554919e06e1Be17D97fC2fFc0eDEe9",
    "userId": "557110086"
  }
}