{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x543fc24c21e3e231138969cdb4a759a8a506dd48eea1d0f0ad486dc8c208e7f3",
    "signature": "0x06d63f350e30d6b146e2ec8178569618c2b3944ac5f38254168361143e3db14a3e25889d8b6c6f037a3a5e6f6a82188ad3f672771e4e30171b20e26d5c9630e51c",
    "signer": "0xb8744362B303B0256F9eb72De3c2268Aa49D430F",
    "userId": "738472358"
  }
}