{
  "manageEntity": {
    "action": "Save",
    "entityId": "527182418",
    "entityType": "Track",
    "nonce": "0x0ffacbdbf6b3ece0c5c49c588378b07426c62471b6b05f89051f26178022eaba",
    "signature": "0xe5b142afdb9cb4a6ca56109888ccdc11cdedf4a1adc1a0e8963f306767ecea0c064291bf15a5e7e8f19d8a870d836470087f6514fc2b2da7b90302c9eacdb1501b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}