{
  "manageEntity": {
    "action": "Save",
    "entityId": "1722852873",
    "entityType": "Track",
    "nonce": "0xece403b8dfac890d74071f617d07d1b31581310ab32b20c7fcddea570f8caeed",
    "signature": "0xe08876d66306ec3e543683224f88afa5e1eb345bf17a0e000c81b3f4036a23e95bc92035d1b1cc5cf9c6fb6d35efb25a31d8ed93415445d5b995267c0f4aa4881b",
    "signer": "0xa5cf2A0b67A9F8aE59B937369F6404d7Fe103c07",
    "userId": "641892598"
  }
}