{
  "manageEntity": {
    "action": "Save",
    "entityId": "1437237075",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5977dfa46e3db6abec4d4928172df3c3692b8e98b0478dd242860ae499f20f06",
    "signature": "0x90f66b7311412d3e0d0f18443ac36cf805dd586148a0341fdf8d8dac8a19e2a32acdba02880f47d6ffda707b7fc3a8a7d8a9d17a2cf2432055a5952a47bb65a21c",
    "signer": "0xca797dA7dCB793742623d55EA81fb92A9566B550",
    "userId": "363062902"
  }
}