{
  "manageEntity": {
    "action": "Save",
    "entityId": "129277",
    "entityType": "Track",
    "nonce": "0xc7a58912424afacf88ffc287936ea562f649e5c5dafbbd23c2ab27e7af258e14",
    "signature": "0xb208863f8f7f20e31ed9f3112ba1e99231fb5b50330185433a4927ba178b74817f23b98d7e7afda48433a9aad31515d9fffd912d6515e1b54c418e1f3a3c35c11c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}