{
  "manageEntity": {
    "action": "Save",
    "entityId": "836987442",
    "entityType": "Track",
    "nonce": "0xe507400e5a61a138ccb3f5d8ba56ea74c0214b58ae8219682fc5e2ef45c58489",
    "signature": "0x510f6732717476f7e8aecc800196e8fe721d52992756151d3155c5d881602b2031504ece2d821f696e9f4b708a562c1c5fbafdf85ed4ccb3f7e61233a99a0b8d1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}