{
  "manageEntity": {
    "action": "Save",
    "entityId": "1814172816",
    "entityType": "Track",
    "nonce": "0x0de404658ca8886ec21f3d322a21b5099c8f5fc33505b8dae83c79a30f5edf6b",
    "signature": "0x94eb6c8ad5fc7a5478b9dddcb7c459551d407c7269b3d2f44a1b49b7a2ea872f4d15289438784245b69657ff4b04b32e870fced69c322f63f79978369a981f821b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}