{
  "manageEntity": {
    "action": "Save",
    "entityId": "743401348",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x493011037d3453bed9fa78cc75b3d9501de0f7b8ae582bbbc752888d3501a388",
    "signature": "0x9aa39ef7fa9e0afea249d7fa126e5a7c86762ce1c08da278a7aba9f8a9fcec2b0e7ceb837458ff87e1c701f38436548a1be182a83fd1f1ff61f14a2fc345fc321c",
    "signer": "0xa6537b4A64192585E782889E1230Cb8E13E01fd1",
    "userId": "154253595"
  }
}