{
  "manageEntity": {
    "action": "Save",
    "entityId": "2075979930",
    "entityType": "Track",
    "nonce": "0xb16ef6bb6fdc5e192fac3c887b35b9e2404719ae182cd2ee2884f99415cd448b",
    "signature": "0x22290a8d4ab699a90d615242b8b3a5971b27ad769bd38672af9bc7d50302a629787a6fca3c2ea7515cdec51a17b5398c325cbdecdd0b858f923f476ad31d4c801b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}