{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1c14649aded2e994fc18214d6f653302b0aa13035340548bf88af93047d3ee3d",
    "signature": "0xbbd6bd3f854b6cd58307e7a6410869ed71e537d6e33186d2d78c60f3e6b64a1a291d5c78e3da46c1549c201e2826c7ea1809e4a65a94f4074b971219c519dfd31c",
    "signer": "0xd066f22fA095a1c8FbEb3a4b64A2a836620C8237",
    "userId": "321313158"
  }
}