{
  "manageEntity": {
    "action": "Save",
    "entityId": "2070293154",
    "entityType": "Track",
    "nonce": "0xbcf28d5723541d2d4225cc2142371e39af44780e42b35df00b4bcf4ba8c1b8e6",
    "signature": "0x876f564c1fe378965652a73cbd979215a08498717a4ffb7d746a887c37d7a94267f2e9d6c8ed1a1eebff4bb912f41f332f9a8ef3d4a21c8df3cc26ae2351053d1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}