{
  "manageEntity": {
    "action": "Save",
    "entityId": "828430462",
    "entityType": "Track",
    "nonce": "0x33c53bbdd36ccdbe40f0b65e5065e834ed313e6837a7f27fe592dd155b86dcb3",
    "signature": "0xa054f2c33a1cb0f7af08a58ce1f2ca96da7c48248b8ae3c00edba4cc1054cd5a5dacd8ab40178cec833b19dbfbf1904a3528e611a598ccade6184249dd03fc4d1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}