{
  "manageEntity": {
    "action": "Save",
    "entityId": "910847930",
    "entityType": "Track",
    "nonce": "0xba8cf72e0e1120829fba19dc6a4169ce05c0e4427fa80066c87269bfffa4f6a1",
    "signature": "0x7f09a59b28849946ccb18b6f83c38ab7ef6fe561a779546fc35079b6462b36615a91f4ef46a4ea38095d4a1609278f9e1dda78ca0003bf15f4d2db173f37cfb61c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}