{
  "manageEntity": {
    "action": "Update",
    "entityId": "578447734",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xef8749e6fd3c1af30841c286659434932ad6bd2e248a29343909f7bacfa9f728",
    "signature": "0x382e229c1da4e7dc79d3426b20912e5e56edfb7def783775f1fd2b600a53b22470bc9919be9c09c06b8d6117591418eca14b65367f6c0ddfafb0472a1ffec5001b",
    "signer": "0xBB3cbF4BFE93A8852DeBD3A264E281621575684B",
    "userId": "578447734"
  }
}