{
  "manageEntity": {
    "action": "Save",
    "entityId": "1643977556",
    "entityType": "Track",
    "nonce": "0x0c0f90bd5f9bcda45224b8f89fa151039bb7fac3df2a0f5b1e93f122455b9e53",
    "signature": "0x2968f076fd3b00135cda32bd4dddf79a59001f713f0f9305c8af8f308da1417e0df54bc541642eebdb110384d15df16e96579c203c898892ea8e15d1396c10861b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}