{
  "manageEntity": {
    "action": "Save",
    "entityId": "314219485",
    "entityType": "Track",
    "nonce": "1792675553345086496",
    "signature": "0xe37be690ba0de8c9b522917bebd99c774ba4127dc9f8b444f81ceb43a3df12d71eb0417edec16ee5cf5dc7a5f0c03def1ec34dc4bca14d460073c0ee9529f2891c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}