{
  "manageEntity": {
    "action": "Save",
    "entityId": "486315",
    "entityType": "Track",
    "nonce": "0xe3b64a88d3f3f1a3e02849ffe4ec4229c089e323760980360e84fc67106ca62d",
    "signature": "0xe4d8f9666e43bf1480c3924a26d9137c6832efbcaa7d134bfacd93cafaf4049513a4e21c782d37b73204caba1463e62c509f8357d24356e4c7e64bcbe6f474a11c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}