{
  "manageEntity": {
    "action": "Save",
    "entityId": "1062523250",
    "entityType": "Track",
    "nonce": "0x9c97b5f643b65c86757d68d38f5c24a0958bf170bdd92adef318a9e6724f93de",
    "signature": "0x81d29209b0392f490177af0061282503a6619ffe456c7ca785426254f7f2d5db705b03e43d460710f16e27dfef924bf2cf93e0691083bd70a547bc642cd4d2721b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}