{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x39bd0479f371331e565ca51b99547affbaca892f09e1a6912a0d33a6572c7079",
    "signature": "0x7f9726a79fc4f22fccc24ccc962779f0f76cc206eab8c92aa1986d1fa959bf0452fe0153ca1bdd44732b79058da69cbffef78cf5bc1ef7cd357153164751c51d1c",
    "signer": "0xbb3b8C270080b0DAE42411345FCDc6a00369e247",
    "userId": "690093689"
  }
}