{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x58eff449feb3997a6fd0232ec0ff5921f2110a08372459c465839040461f3f8d",
    "signature": "0xf30c74e0e60f067185f59dcfb4017ef018f27ed0867d60feaf4305c95939e38b1cfb3056fa3b9c34c28b703ce70ccb352230de79a452955e12a7cb1c5595741e1c",
    "signer": "0x73EeD6F2abD54edC194B1af96eE10A48DF993a6E",
    "userId": "116702135"
  }
}