{
  "manageEntity": {
    "action": "Save",
    "entityId": "207677",
    "entityType": "Track",
    "nonce": "0xba3c052497379c30dce3fe48f54ca0e86fcfba13011b02b58acf58a36509d52e",
    "signature": "0xe00fcdd76e281dfab87a4cce1b37f1068a95b371bd1ae681153b0af0ff623e2f3fb043ec8a3af95dfc8d8f721e1d6c2aa9abb8c705c521d49c3c89574a51424f1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}