{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x773d43eeaede29f2653a87edf93cac223eae80c9e4eca2b25e02281d990adc78",
    "signature": "0x3bc772de212a1e311d006b09f26d3fda68fbc3e3f09a270114cc5d987bc73db21c71a296854916b3fa995aa6ee00bbdb28b5e280c470d657df8c37b7a47cf8b61c",
    "signer": "0xeadDb6aE7f5dBfaC2d712F6888e47037c90dFa9C",
    "userId": "545617244"
  }
}