{
  "manageEntity": {
    "action": "Save",
    "entityId": "100007454",
    "entityType": "Track",
    "nonce": "0xebfa615e2a2a34b6f51125706b610481a6fcae132aa79b16944d7dcfe3c0a1cd",
    "signature": "0x3cf3b24344ec551408692cbd20e0c1cdb785c0706f3a7bd7a9b77e9dd572089f33e18a2b2a8a92a38a89dda159f9bdef409542ad68c6e0a914f7835ecdbae62c1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}