{
  "manageEntity": {
    "action": "Save",
    "entityId": "758725866",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4289795228f69424ab5460e37ee925410bc161130292d377c799b813cf9e49e3",
    "signature": "0x3b69ae1ae794088528ed7ff41b55f6571b011ea7e463ebe91b399d00d9101d526016268ae85318cebac2c2d354843a8e95a83e54224b435723c63cff525a89241b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}