{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xab86ff8cd459a5abdbdb78074bf121b473f831b2840e6b38f90629ad2bf4ef3b",
    "signature": "0x703b3e02bc2ec080f20a2dac0c248d40e6d2dfb4ba2aa195a50e0fe3cb9ce6bd2729b0acdfa6c3a809f877fc69759764b54c5ba75f00273c5024b778ffc36a311b",
    "signer": "0x7b67b05bA0A04e49662cf931d72cCAE0839D71C2",
    "userId": "506671051"
  }
}