{
  "manageEntity": {
    "action": "Save",
    "entityId": "984106446",
    "entityType": "Track",
    "nonce": "0x342687fba23191378cc0071bd55ba1e151f096953a1b84cfcbf8ca58f8b5e249",
    "signature": "0x8699faa99d9159d284461593cad87998dd400a07b2ab630fd6321d55b7e3ca836ca04e2349dd84bacf5827a9abbe4986d48f97c0e9b770c49cd68add3d2816051c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}