{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3761f1ec67463ebc029f2f9d73c8b80aa68c2df1580a5507abc8fcf607e8afab",
    "signature": "0xf31642985aaf96a6c9213339b23ceeea2d080a18c0b92e45105dbcebee798a1f6eecfef430a0481dc9888d4dcc1f6a7ec0ffdbb0ae426c17d3b2e610519477b01b",
    "signer": "0xbb3b8C270080b0DAE42411345FCDc6a00369e247",
    "userId": "690093689"
  }
}