{
  "manageEntity": {
    "action": "Save",
    "entityId": "1280626315",
    "entityType": "Track",
    "nonce": "0xaea39c221f0fbb861f061912424048b78e492f9f1c02bb4b96cca04abc1483d9",
    "signature": "0x47eba9b61a725c6f454d0d1bc18aa51c0db5c63c82bbfd36cff2f46aa9378a046101827358c91748855e36053ea6257fb3e5f2571a139259990f3b48a693bd4e1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}