{
  "manageEntity": {
    "action": "Save",
    "entityId": "925073735",
    "entityType": "Track",
    "nonce": "0x374362dd730cb2dcddd60e558e22000476e6be9b36497da20cdb75e14aa02569",
    "signature": "0x267aa018b046056422afaddd8fd3e9deab0bfe66c115ab1fdfc89d58fb8b10713ba4e528bd2353a08a5c22059a185002a207db7ff6fe1804096a278c0447784b1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}