{
  "manageEntity": {
    "action": "Save",
    "entityId": "1833646322",
    "entityType": "Track",
    "nonce": "0xb02f9526e10bed02e832e6d734852aaaa4efcda556ad0d8917e90069cc3e5223",
    "signature": "0x3ed0c0e163c9d20e08750c7c39716826079394c40e2c0ad3e3fd74c8a1e3f45e559630c01d6679368bf686a520837790e60d3dc0e3108b0407dd4a772df9bc6f1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}