{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x26d00e0039f8b830f68acb784f6eedefb76b6d8fcb7bacbb17fd2d5f264edfa6",
    "signature": "0x8221f30126d59a750d9eb421264d8e7bc8f3d010942bc0b2a7c3dfd3a93cade66c9ce31261037f758bd4868e7608976a65cfbcb53c4b7c5b8f4dcee75a91306c1c",
    "signer": "0xe1f89084B704BB78f3E9778899F1cc0c6Eb15018",
    "userId": "895654416"
  }
}