{
  "manageEntity": {
    "action": "Save",
    "entityId": "1212136631",
    "entityType": "Track",
    "nonce": "0x6e7cb1de06944647e36d9da742fbc6d37237a056a262e962573070afedcb4441",
    "signature": "0xb53d9e1397d6a48a6a7fe9ebf2941241cd759c9737a1e177d2f877bbef9712ca6a7cf99edddfb805bd5fb111d7eeca96ec3577f68daa1d4ef30c5d55825566d21b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}