{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x042fe67d3e67b4e21583503d15f95a05263e79b972b1223e88efcd0f08c989d4",
    "signature": "0xdef5536e46530f5dfc867dc3a969203f49404bfa1e960bd6e9275ff679e26e5e6e9917a117f5e860b70a18c3a0a2aa7564e45e25e3c191f2932072bc6721d44f1c",
    "signer": "0x6B3B162a8a1d6add15f3aC1019E5825eC58DCb64",
    "userId": "710165454"
  }
}