{
  "manageEntity": {
    "action": "Save",
    "entityId": "308130674",
    "entityType": "Track",
    "nonce": "0x03856197030a4c26169bb63bdb36284da4b27f5879c41510020c7b1fee1c478f",
    "signature": "0x233b652628fbc39ef1c85b7b22976287b248280182478e764c4ea5ef76de85366bd0c0a968414ed4d900ada9a416b3b7fd8889a4c126fe032684fca5e568d9621c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}