{
  "manageEntity": {
    "action": "Save",
    "entityId": "1470126991",
    "entityType": "Track",
    "nonce": "0x3a37e2cf571b0e82778135fd225f5c34efad6eca48f99e09a2b5d908b6a23e48",
    "signature": "0xde40cbb5553200defa55a555b70c22824a54ec39ae84d67e273165908c85b3903e5d9f42271872a4d2cd22a67357d262785f48ca99441959eb3e955007477a271c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}