{
  "manageEntity": {
    "action": "Save",
    "entityId": "474540973",
    "entityType": "Track",
    "nonce": "0xed1783629a35d1ef0337ff7a2fd02185518ed3d9e081064b1dc3ba69971f467c",
    "signature": "0x548d7aa887bbfdaf42880560139ea53008c72d6a6e727505ad10cf5046a000024cea95a00f9c989f018ac59440c16ffbcedd9e46a48167e0452266f9372dd3761c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}