{
  "manageEntity": {
    "action": "Save",
    "entityId": "418764875",
    "entityType": "Track",
    "nonce": "0xf6161ccc5daf0456755b1baa8d6607437b7eb4560254ee90476af67044657443",
    "signature": "0xe4f7b01b01d81b518b15e9c44c86b67d04232b3158d7a9c535abaa692265320f630c64409b022e2bb927c2fe48b3276cd23efed2151bc094f3bfdb154ed0c6c61c",
    "signer": "0x92328BFDeD38C9a9De6E253A0CF5CB46A3B28611",
    "userId": "831117417"
  }
}