{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x761e56ff47bebd2e912cf2da73883b756025034b26f82aad009f92abb3058254",
    "signature": "0x9d6a49a5ad2f16109e99e5760cbbeff2d71988beb728e9e7e3d8da2d7e59555a34ae969f453f71db287f930a195c16c96f30dcca60f4d37d5a4ded01ba870c1a1c",
    "signer": "0x09Ed944A6653804DF5E864d5240c837F643E2c0F",
    "userId": "214509563"
  }
}