{
  "manageEntity": {
    "action": "Save",
    "entityId": "1419033125",
    "entityType": "Track",
    "nonce": "0x7f04e0808f600f611ddfc9eff2a9a596ac397f71f19be03cc2c0ec18436e0712",
    "signature": "0x485b86b557b27798411144d2410c8367f08ee1018f7ed69a2a9f38812d6b5fe2594e6e89510154a4f2aab5bc36602334898897f7462c9679b63520bf1f3ba1791b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}