{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2ddb0ca2717b080eed5ff7db5f3155b759d48081cc7608c5b9ea23c616f1cb91",
    "signature": "0x51f64c22aee00f00512c648ae8d2848fa762eaf42f7d38680158bbe76d83cd7e166ecc3701b1c234e3a284395b4542d59854731bdb498456be4dc2225ea159441c",
    "signer": "0x1f3C9a2A07c1F7Ae915Eee4eFA3E48f63a1Fecc3",
    "userId": "983839410"
  }
}