{
  "manageEntity": {
    "action": "Save",
    "entityId": "1172",
    "entityType": "Track",
    "nonce": "0x4adf527763da6ab6a79ae80f3740717b19e79374ea7486e4e09838409c05a020",
    "signature": "0x3054abf62770cad855ee1dfec4d90bbcc619f38cc26c56ea8c5ead57cc7471f97f3bf9f18d93b4965a73c499663c60f5e38b96dca5ea7685c34b720ac7dfe1281b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}