{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb115ba9c2218aa089ac61efa024262a3c309ae0158633507c85dc653dc9defcc",
    "signature": "0x4b96068247d6414ec361ff56f452c6344d3e76cda43cc70edaff16fce920fb4240e38204efc3752fa174454c228fdc70161c842666a67482f72a0cc38fb673c21c",
    "signer": "0x51333785a138d7ec3EadABFC1eCe99323D5bE91e",
    "userId": "505053716"
  }
}