{
  "manageEntity": {
    "action": "Save",
    "entityId": "1862303419",
    "entityType": "Track",
    "nonce": "0x7873a190d4002374af8dda1d117c7895b2626affc3febcf8c962493079385cf6",
    "signature": "0x1feec0a64024428d93517edf03926826235dedb7ce9ba3792b8b2fbe442935764d84a4cf081ae169cd396a07a70cfe175c2212ebe8245ae7bb2f99e5d62133e91c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}