{
  "manageEntity": {
    "action": "Save",
    "entityId": "2143204675",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1139c30258f911b97b0e5e8b0b5957d3697bbd6870fa5a062993cc12d3e8f85b",
    "signature": "0x240098d670a1b3731eaff267a8bead7bdc344e4da72b87e34127052069e421050d4ae3af86cd1f7a6efb124d4031a58a40bdf93e6ab0484814ab3c9113eb59f91c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}