{
  "manageEntity": {
    "action": "Save",
    "entityId": "270596647",
    "entityType": "Track",
    "nonce": "0x2e4155131e1b574b1136ce28fa5a25a4951e6b23214a7f019c333baf4ee67566",
    "signature": "0x2ad7c1eb64536976e1989f1eb7300bb3a5cb5eee895d8fa73ce99bf2a9e1fbef6cb0fe1ebab81f2075ec3968f5c5d4e93213444ab696ee457049b41e635038d21b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}