{
  "manageEntity": {
    "action": "Update",
    "entityId": "150216793",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x15337cf6af2e8468b44aca7252a051cc860a0b5e366ad59e0ec2b6edd84c9d05",
    "signature": "0x2ef312eb1e0be2e6100cd78014c6b38cc409ce4360636f9cce32b9e3dd3a91622b1bc9343f5106ed03df81fd5fb2073745ed7b35f8f72f4ee2f773630b5c57231b",
    "signer": "0xb841D7d7966E43630444A3A9d2F02094fFa66a4d",
    "userId": "150216793"
  }
}