{
  "manageEntity": {
    "action": "Update",
    "entityId": "37971820",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd429b62542009192f757916445ba63c6da5b1a8fea195174dcc7882f32653afb",
    "signature": "0xd0cc84d3fa3c404d92fd9bb47aad9dac421f645100db0761e08377bc808fcf5171755c7463374944a6c409b13981fcc13498b60f3e90e1461d5ad6bdd88d561a1c",
    "signer": "0x71E9d09081F97e64044628F0ad07844068206d34",
    "userId": "37971820"
  }
}