{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf2df19b99bc7e4cdd68eb83f97c6413854772f055b41cdccd92378ffd363f94c",
    "signature": "0x9155cb86276980af7b47a46fbe1c75832942abfe1b810d3e2e6bf8c5fddd63dd4375a647f9a4022f587ef401deead6011f14cf3ea36101df1cbdffc81ded462b1b",
    "signer": "0x06902ed62bf3DeB2BA8Bb75F08cE93c1E87A7Ec7",
    "userId": "789121538"
  }
}