{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdd68ef80393c29c769fa998bb93f78b670d334053bf17f3fc1e60fca627b8abf",
    "signature": "0xdad03b0c10173126ab10abf9260ca027e79c509b2e253fb796f76412fd9f4b4769dc2e705bf920cb7bf83313517eb8ad317211506da3a85990f2db4fd60d5cb61b",
    "signer": "0xe4afcc6e1c8bA44DEc449fe3DB99CB195ece289D",
    "userId": "800127364"
  }
}