{
  "manageEntity": {
    "action": "Save",
    "entityId": "415791255",
    "entityType": "Track",
    "nonce": "0xb9a18f68eeb85fbfe859d4b64aad955a06899960e76e47e57bbd12774bef6099",
    "signature": "0xa56ae86ff95016173c89d7c2f9b2f3825b10de717b271187e3b7dcd1e565668f04a54d9aff8199f6dc0c787c9951f3e8509acd5ffdc6d60e7161e312369c56921c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}