{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x93873b75b9374f13f3c81d90d091db7c807b1c438d6510728bb346ce030b2715",
    "signature": "0xbb91f4db0428458faa4fc313e9dfb72e44b4b56dc97f85a0be92646d8f96879222c2b5a53f3a89be9dd3c63db8b841dd062f96aa50b5e18f9c5a422c167d962b1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}