{
  "manageEntity": {
    "action": "Update",
    "entityId": "899947343",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieradrs3pj2d7j6c6i5quwx2r5lzkdamvdirvgijus3amlwdmb4inbfa\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1354401089},{\"type\":\"playlist\",\"playlist_id\":655803316},{\"type\":\"playlist\",\"playlist_id\":1543856926}]}}}",
    "nonce": "0x4c379c7fdd83c7cc2967b9d1a348ec7b25c6ccca8c84105391b5eb0543cd60b0",
    "signature": "0xd71cd53666dea8ca990f5daa07529656a6e5ac23ec7f0b6d5d5b5c4c74a2c0781e3c4bd019074a189e0cfe6bb1bcc3b01ce57aeacff11e00408f40b90ef2e75b1b",
    "signer": "0xC4609fAC097EE47E2F38A3715dC1503f88331bC8",
    "userId": "899947343"
  }
}