{
  "manageEntity": {
    "action": "Update",
    "entityId": "40456963",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa78473c60d866177e77367302d7e38c1bac7889d108614cdb19ca9bfaf8d5a5e",
    "signature": "0x958146964c7b8cdc636a5787adafa991f413bcdfcafe537882ac0991b0dd7d7b0fc4afe82e2de04f9450bc0b50519a33e4e878dd1aa71befbeb4404c2f43be681b",
    "signer": "0xc03B0DC91D4dd69BB843F957bAe8D3B7aA1317EB",
    "userId": "40456963"
  }
}