{
  "manageEntity": {
    "action": "Update",
    "entityId": "763221081",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierakikuxqbif6binpsbqoruopc6dzqgapewwzjpbrphxu3l3rz5sthq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1374290324}]}}}",
    "nonce": "0x36ca7f4485c1d7dd7895caa25b23960da0dd144506ea0258d72c2ef41638367b",
    "signature": "0x2dd496088fbae356c72d0d430b86ac7a86fe1825051120c602ecb58740769e0e57fac65aebef1af0ac265a86c00ba2ce00386d88b31e8e77250198bb998f885a1c",
    "signer": "0x7173743A42637B8FCa1dB2218B9828Fa14b3995C",
    "userId": "763221081"
  }
}