{
  "manageEntity": {
    "action": "Save",
    "entityId": "565120728",
    "entityType": "Track",
    "nonce": "0x3a79f9323024a3d0b7fe2a31501fe72cd30a7cd0568a4d728e093ba78af8783d",
    "signature": "0x2c7ef5acbb40151b38efedefb68099ba299cb2f9e2f504bd8222eeb81bd2e7981286ff586b018b14876b8b81976c32bb3ea07d4bd9c01c5bb93d2a94944ba6521b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}