{
  "manageEntity": {
    "action": "Save",
    "entityId": "1831355183",
    "entityType": "Track",
    "nonce": "0x09dc6e5fd4d189624788cbd8be51b7a81a9704e59b6eb9d721423470975130c0",
    "signature": "0x60b6de52c6ea97128858fa7fa8a8e92c0ccbff14c21fdb482c8d673f7294057a0134a818b606a1160dca9a7eceeefeb49abe7545c15e325f8e4ec679dcc4fbbf1c",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}