{
  "manageEntity": {
    "action": "Save",
    "entityId": "1018157360",
    "entityType": "Track",
    "nonce": "0xea15ff4b38bd3bdcdc374371153fcfa03c37582ab37e0aa07ad8ab52372482f3",
    "signature": "0x7afc7d6838f7aa6d834eb1470f845d10260c0f5a7a5062d314280a11df0eaf5e5d16dfd2f8c20b5833950fd369912354fba10e33bd1f51c23d819f21510cfcb61b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}