{
  "manageEntity": {
    "action": "Save",
    "entityId": "367018",
    "entityType": "Track",
    "nonce": "0xa64291308780b8cfdd8f1ddbb7dc5aea15397e19586851f84a25829c4165c139",
    "signature": "0x07dabf3b8c48aa5660cc02b03f710ab18d29fc8b676ff8b2af21e3b7faf542b1390c2236d9fa618a1729e08807a557fd34ea52e3cd1495ec36ae5cc9a5e7458e1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}