{
  "manageEntity": {
    "action": "Save",
    "entityId": "1774960477",
    "entityType": "Track",
    "nonce": "0xce7381b0417685e9da520e649b4ad44ed864ba6631c5ba7177d2298a67fbfe7c",
    "signature": "0x2f1a430043a894d815032f7913176cd7b02f4bb69aa864ec5662f1ec3bbd76412894a3a3a06e672743e8e80df5b1349965e607c50c49197f039958c606c9d3041b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}