{
  "manageEntity": {
    "action": "Save",
    "entityId": "1052920297",
    "entityType": "Track",
    "nonce": "0xe0daf92e9160cd9cf3778b70b0321cd0132e1332ec4874706681427bb039da20",
    "signature": "0x7789e6b1868598c91f96dbd6914be280f9021d14f22d32b88e74569f24017e40427391f2fd5076b21d27c76dcbff6f0d18a42b11df84fcb41c3d793d78bda2a01c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}