{
  "manageEntity": {
    "action": "Save",
    "entityId": "695474",
    "entityType": "Track",
    "nonce": "0x0894d12f6685dcb2c087b417696575b15b0bb631b6efc5f6d12186f68d89e6df",
    "signature": "0xca2ad6e2136e89d9a20521d62d76db8ef3520abbbcff94f63603fd6e38585d7c0dd0fb55f84806efa67a8b9035868757f6188137100182c362dbf8576b85ce8c1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}