{
  "manageEntity": {
    "action": "Save",
    "entityId": "410426477",
    "entityType": "Track",
    "nonce": "0x7e18a532855525b5ec4d60fa43e77f937c3da7225ca48c894e40c653c4d0cce4",
    "signature": "0xc36b88d19de934fa3c493a71dd9c86355bc27f564cb043e2329278aa4186731174a2e8bb72096b870fa7ec97976e87654c27590f6ae33dc0364714cedac992f01b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}