{
  "manageEntity": {
    "action": "Save",
    "entityId": "489615",
    "entityType": "Track",
    "nonce": "0x19d40963684d7d66e2d3d352ee3f82ea84f2ebb8bf2bd828bca93a69c24df528",
    "signature": "0x1f81de8c522e2eb12aee52f07bb32f842aa11355866e3a3c030b20c6e5d6ef49795d1b2de70b9708de81cc95995970686649d477e40965df13d7f5af2a8112591c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}