{
  "manageEntity": {
    "action": "Save",
    "entityId": "172735415",
    "entityType": "Track",
    "nonce": "0xe2c9b96eeb1ab88fb823412ca3a456096d5c111ba5760743aaf65c2fb69281f0",
    "signature": "0xa344c7d4e5a28a83056ed1c21e0953d4e745ad34a577e77f55052a4b27eac5c74b575b334e6d34b49eb862b7d9e69992ede04fa5e894b8099f3ec1358f987f271b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}