{
  "manageEntity": {
    "action": "Save",
    "entityId": "62240",
    "entityType": "Track",
    "nonce": "0x99cce9a8c67842343c2f3caf512abe84767b8848853e5a51dce9ab04a60d5779",
    "signature": "0xa68b140212aa7cbb82ab6088fed851d13548b0823893344045303e1491be1df44d51b0256a4b6c3ae065bcb59765f805a015de9fb56500adfd42d720b121abf01c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}