{
  "manageEntity": {
    "action": "Save",
    "entityId": "553787157",
    "entityType": "Track",
    "nonce": "0xba826ba85a7ea2369cbf7a7298cd100866691e5dc60d4ff840274f21426080b2",
    "signature": "0xe18b2352890c16431c98012c5b43e6d0a43a42b91c6b47a94cc20218f2ed12f879ca71da9943d951acc1d13be951acaff695121100fad29488edfd5f8efe8f9f1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}