{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6f6ee567ad8a54f247443354213ce8a0eac356a2c694f3f0b8c8763657b5ff17",
    "signature": "0xbb622310ccb914fc7dcce8ede86e395d5fb60e26a1ed34c71bc473a6f5e0a3a34c99971f7515e0e4e23190860e08b8696fed6814855fc48cfdd59273a4bf330a1b",
    "signer": "0xAD64DE85d51a9A1F8e9E1D46641d088C99419941",
    "userId": "347056744"
  }
}