{
  "manageEntity": {
    "action": "Update",
    "entityId": "30403219",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierapemne5viavddtjaliwelzg57zu3lupgy5vqd6bfiiz7kzvnm5wpa\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1400989188}]}}}",
    "nonce": "0x408e2955447a361933b4ae05f87090c4f10dfe04e01b1b3cca0456f3b62a499e",
    "signature": "0xe9d945b4d378007d023985fbba8d0b24995a762043d173c72f87004bc6ebaf704997f19814023db5841b0a4cee3251f3b7e7cfcfd05600a4eae641064ceb862f1c",
    "signer": "0xE5439a0580b68F2058cCbdB27461859c63B3C9C1",
    "userId": "30403219"
  }
}