{
  "manageEntity": {
    "action": "Save",
    "entityId": "809618038",
    "entityType": "Track",
    "nonce": "0x29c266ffde348ea75473287abba24b59e1e244abcd42ca7848dff05b54795a6c",
    "signature": "0xe47895fe7ac7a35cf26305a669618e4238045ef91bee40c572fb075409462527327bcdca54dbe108be53bb42f13484e8f605fcf0b60544a28fc7ca4ce1beb5311b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}