{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3c1bf2a8da6607c0f59716b770159c7a9b70b75f8d89549ed4431ec1d2d78ac3",
    "signature": "0x13bf7414feb16d8e56c72a3a0ce69ec044d20ca2bc4fabe5c7d25820acd1c67a2611cde5fe897fdf240032131aa77cfbb7422b4af6a83bcb2a2021d1de5455211b",
    "signer": "0xaEdefB0Af082e7133c9294810e332608EE65bCbC",
    "userId": "174259073"
  }
}