{
  "manageEntity": {
    "action": "Save",
    "entityId": "1055574709",
    "entityType": "Track",
    "nonce": "0x55d587838a1915aff876ab8eb06b131b03a89cabf03453767585f368be6f9b81",
    "signature": "0x959a516363f3d1b1c523d94d42997da0a67120ad91217d15a4a0f34199d6564b78a4a6b0b1db2c48a06f728ecf5b2fc4b844c6afed420389b41d4ee3072868501b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}