{
  "manageEntity": {
    "action": "Save",
    "entityId": "624067",
    "entityType": "Track",
    "nonce": "0xbf4d38f061938bce142c561c09ef0d9f5d7c8188f35214334ee5068adc7b0058",
    "signature": "0xb14d9ffaceac82f3f57b0b0a3ce0ce65acb63c840d4743e815f969c69b26bee92832edd63d63dfbb3d5b78a47a6feacd737e4de8bc0e77e1bbdf0a74efed05541b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}