{
  "manageEntity": {
    "action": "Save",
    "entityId": "8591",
    "entityType": "Track",
    "nonce": "0x9fc07e25ac5522b661f98a0c545527e82e519bb9090e8da35960c0b9faa4af8b",
    "signature": "0xba56cb7ec075253e1aff43c3572207712af470f5384f5b2cd34b5964e714a023262927ee528f4d96c38982ee340141e91b540a78e5a880f31f884bce02b547bf1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}