{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf745248d45a09b2027ed044d0dcab2d41e76759e9f74015561d641cc0af3527e",
    "signature": "0x8a1f14153bf7e60385c9dfc0704913eddafbbe1290f7c12752326e79117eea434692f5050347bd368b39d5466ceb7e80a00809860d6c62e9a6704a6f536d811a1b",
    "signer": "0x539dA07eC1BAFf8fe039C98c2CA1507dD9B36504",
    "userId": "227507310"
  }
}