{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x901f6a8936c3284d46ca0be7d13f0a163f2278383148515ba731f233c20daf19",
    "signature": "0xd958ec238dc7126fcaadfbce211946275ec39bc8bda5e31f3252374b86e278d20fa5d8a018dd8d32ccbb98725074038ed499a1eabf13b9638f60590291842ea31b",
    "signer": "0x75086270d55282Ad1107e72C38225d5Cee3c987F",
    "userId": "590666223"
  }
}