{
  "manageEntity": {
    "action": "Update",
    "entityId": "615978746",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd352920a9d261081283eb542709195767dcf027e20c72420b10763cb688de62f",
    "signature": "0xa8c8fa5cf6e66e8fd94dc2152dd6eb58e58e6cfa3c763fcffc8ca665164e9ce1121d18e060c2766c03ced640d1d2cdcd5e99f5d57b8b188ca667b94c4c1b7ccc1b",
    "signer": "0x46Af715139332D14cdB187A1066c0317874766ab",
    "userId": "615978746"
  }
}