{
  "manageEntity": {
    "action": "Save",
    "entityId": "496242803",
    "entityType": "Track",
    "nonce": "0x1d8e37e91c0a6bb6ff482451ecdd0f377d31961b51f2c5669eab6f89bebffc40",
    "signature": "0xa0be32cdb09827f09e0ca1b4907c6393510d443b8afed91078f64c15f08655ed2061b73b6b04c12ee206d5356a63efe9675f4fa3356150861bfa730c40d2ded41c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}