{
  "manageEntity": {
    "action": "Save",
    "entityId": "842098319",
    "entityType": "Track",
    "nonce": "0x4abc2ff40cf4f15d5d23bb66899394c68f6b27297c6ac870a13854d8b8a1ce41",
    "signature": "0x57b8b57435eb8a79817d5e5942413aa5568dde38ab40f3bb1c851d5e6a9d77766c692c98d0b4cd781f0a62080e2abc849d5ccd329f8f9f6ba7d14b4fd78bbe801b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}