{
  "manageEntity": {
    "action": "Save",
    "entityId": "1125699",
    "entityType": "Track",
    "nonce": "0xafe662ce0a6015e2b934282c87e74541693d1273d45cd4e1a175ed47bac4df19",
    "signature": "0xeb81de136a62f2c6bf7d0a490319a773975dfc27c4ff75291f3f6d76055900c51c28166dfb814ea079e409e7aa19f5c53414b7c373d0a08e83665d258bb77c991c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}