{
  "manageEntity": {
    "action": "Update",
    "entityId": "257259514",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x1950b398869254775e71a1944ec4beeae630081acf22c7055740f5932c3887e3",
    "signature": "0x96949f9e083d7b39ca19085b9984bbae759b36bf9df6cf571a5646ecc2fa1ed82db61b55803e34987127c98d6662c78d144225ea58e76962594a12c608ab7b4e1c",
    "signer": "0x647053e7d7A569aebB020C433b0FD5Ab5d0bb277",
    "userId": "257259514"
  }
}