{
  "manageEntity": {
    "action": "Save",
    "entityId": "34121150",
    "entityType": "Track",
    "nonce": "0xc7d907522d4ff2c9fd548cd526b3f8d7dcfe90d6ab0505cfa540ad3a3bbbf51d",
    "signature": "0x41567752e6cfc0baed613be9a4bc928c27fe44db59779a9d2fd806b894c0420b4cb8076c2e8983b7fd9d0655144fc559c2d1e503df1434de726a9e86a82aa0581b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}