{
  "manageEntity": {
    "action": "Save",
    "entityId": "1932248100",
    "entityType": "Track",
    "nonce": "0x9304d877138684ea20761c2f5594d411e7df793e52e33c4ab1adae70307b076a",
    "signature": "0x8c1d4df6bb018e32df4804a0c6db6a6b413b0b3bac8f4f2662582924fdaffc6c0f61a632b00b680b17d4e0ce66a41cc229f341cb70b95a16289bd6199a6cb74c1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}