{
  "manageEntity": {
    "action": "Save",
    "entityId": "1294147832",
    "entityType": "Track",
    "nonce": "0xde8bdcf25433313d787d5c6582a385d34e15c92a99d79d358ce256cdacf4f161",
    "signature": "0x3182dc6459df079ed6d8536673e1255e70a360c7c07faf75e14aa985219a368647689ea7c483132532d62ae1d23bdf7dc52b867002f4aa1dfdbc909b4cdcc8121c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}