{
  "manageEntity": {
    "action": "Save",
    "entityId": "602326511",
    "entityType": "Track",
    "nonce": "0x753934d07f763c657b35084da87941f634a3a694c7cc21a6d290708ba4d185b9",
    "signature": "0xc870160bf8931bc22a0a2dfe24f0063503148822678d90d3c325ce144864a5cf3397ac2728185b3b7c07f8e88a3799f19c82b58f51eb9e5d3f3917a00a5382cc1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}