{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0d9229ec95b428753701a31b3777fa56943ffb867384c274e1509b2dc9f86852",
    "signature": "0x8a540be35672304ba04d201cd753410876b661913ff32e3d678bcf475cc700902d7a0e8fb041296cd42a90cf010800fbd0be2a2eddb6f0df063d121f7915312b1b",
    "signer": "0x1D8cB3Ecc9Cd7e23dC2aa1E1A07F64363Ee9599E",
    "userId": "553152525"
  }
}