{
  "manageEntity": {
    "action": "Save",
    "entityId": "1334060209",
    "entityType": "Track",
    "nonce": "0xc483c5de9ed5a2f8f4bc387f27ba6c610cab83e8eebb10a15f79305e3bb10a83",
    "signature": "0x343121dcf59223ccbdf9491fd8750c84b1c6d06bf1d3c7be077b3570b1521f496042c271766f9e226e15357098c8860a7654a12b80650673b25ff757712886f11c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}