{
  "manageEntity": {
    "action": "Save",
    "entityId": "959934506",
    "entityType": "Track",
    "nonce": "0x56cb2737f61439c1824f419bc2e7659a2eed98f1340fa249807aa8bd4c5dd2a6",
    "signature": "0x115691cc55fa0981517d76ff1ef6c131f22dddcc14467c4ab0c31b7f624c749d1da618d018ae3ad345d4a7269b4ff791d4a35738628c38269451cc4bc7a96e801b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}