{
  "manageEntity": {
    "action": "Save",
    "entityId": "624310535",
    "entityType": "Track",
    "nonce": "0x7e70aefae64e166b0f2edbf0a7262922ec81e70e59b8eef54ce2c156d04e0f91",
    "signature": "0x81e01b2a6bd01b389a5249dfb6e786c3f003635b9ff7e6bb55a258efdb45233c3f7b70b6200895a9b6119432b11972a648d2704cc58299a31dca8b888ca32bd21b",
    "signer": "0xbd18A0CEDC52343842f076A474bA46656B93A232",
    "userId": "194819663"
  }
}